Mitsubishi SD200U, Руководство по обслуживанию

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B-2
PCB-SIGNAL(2/4)
IC201 NC7SZ14P5X
Inputs
Y
A
Outputs
L
H
H
L
Y=A
H = HIGH Logic Level
L = LOW Logic Level
FUNCTION TABLE
NC
A
GND
V
CC
Y
1
2
3
5
4
IC202,IC203,IC204 HD74LVC245T
2
3
4
5
6
7
8
9
1
19
11
12
13
14
15
16
17
18
A0
A1
A2
A3
A4
A5
A6
A7
T/R
OE
B7
B6
B5
B4
B3
B2
B1
B0
A
DATA
PORT
B
DATA
PORT
B DATA A DATA
A DATA B DATA
ISOLATION
T/R OE
L L
L H
H X
IN
OUT
H
L
X : HIGH LEVEL
: LOW LEVEL
: DON'T CARE
TRUTH TABLE
IC270 ICS570B
÷
2
Phase
Detector,
Change
Pump, and
Loop Filter
divide by N
Output
Buffer
Output
Buffer
2
ICLK
S0
FBIN
CLK
CLK/2
4
1
6
5
7
8
S1
Voltage
Controlled
Oscillator
IC280 NC7SZ86P5X
A
B
GND Y
1
2
3
5
4
Inputs
B
Y
A
Outputs
L
L
H
H
L H
L L
H
H H L
Y=A B
H = HIGH Logic Level
L = LOW Logic Level
FUNCTION TABLE
IC281 NC7SZ374P6X
Output
FUNCTION TABLE
L
H
Z
L
H
X
X
L
H
L
L
X
OE
Inputs
CP D
H = HIGH Logic Level
L = LOW Logic Level
Z = High Impedance
Qn = No change in data
X = Immaterial
Q
Qn
D
GND
OE
V
CC
CP
1
2
3
CP
D
Q
Q
6
4
5